// ******************************************************************
// Copyright � 2015-2018 nventive inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// ******************************************************************
using System;
using CommonServiceLocator;

namespace Uno.Extensions
{
    public static class ExtensionsProvider
    {
        public static TService Get<TService, TConcrete>()
            where TConcrete : TService, new()
			where TService : class
        {
            var service = ServiceLocator.IsLocationProviderSet ? ServiceLocator.Current.GetInstance<TService>() : null;

            if (service == null)
            {
                service = new TConcrete();
            }

            return service;
        }

		public static TService Get<TService>(Func<TService> defaultFactory)
			where TService : class
		{
			var service =
                ServiceLocator.IsLocationProviderSet ? ServiceLocator.Current.GetInstance<TService>() : null
				?? defaultFactory();

			return service;
		}
	}
}